Everything about Al-nayrizi totally explained
Abū’l-‘Abbās al-Faḍl ibn Ḥātim al-Nairīzī (
Latin name:
Anaritius), was a 9-10th century
Persian mathematician and astronomer from
Nayriz, a town near
Shiraz,
Fars,
Iran.
He flourished under
al-Mu'tadid, Caliph from
892 to
902, and compiled astronomical tables, writing a book for al-Mu'tadid on atmospheric phenomena.
Nayrizi wrote commentaries on
Ptolemy and
Euclid. The latter were translated by
Gerard of Cremona. Nairizi used the so-called umbra (versa), the equivalent to the tangent, as a genuine trigonometric line (but he was anticipated in this by
al-Marwazi).
He wrote a treatise on the spherical astrolabe, which is very elaborate and seems to be the best Arabic work on the subject. It is divided into four books:
- Historical and critical introduction.
- Description of the spherical astrolabe; its superiority over plane astrolabes and all other astronomical instruments.
- Applications.
- Applications.
Ibn al-Nadim mentions Nayrizi as a distinguished astronomer with Eight works by him listed in his book
al-Fihrist.
Further Information
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